Connected: An Internet Encyclopedia
RFC 1583 - 13.7. Receiving link state acknowledgments

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### 13.7. Receiving link state acknowledgments

Many consistency checks have been made on a received Link State Acknowledgment packet before it is handed to the flooding procedure. In particular, it has been associated with a particular neighbor. If this neighbor is in a lesser state than Exchange, the Link State Acknowledgment packet is discarded.

Otherwise, for each acknowledgment in the Link State Acknowledgment packet, the following steps are performed:

- Does the advertisement acknowledged have an instance on the Link state retransmission list for the neighbor? If not, examine the next acknowledgment. Otherwise:

- If the acknowledgment is for the same instance that is contained on the list, remove the item from the list and examine the next acknowledgment. Otherwise:

- Log the questionable acknowledgment, and examine the next one.

Next: 14. Aging The Link State Database

Connected: An Internet Encyclopedia
RFC 1583 - 13.7. Receiving link state acknowledgments